The sum of all multiples of 6 between 12 and 87 is equal to 624.
How to get the sum?
The multiples of 6 are of the form: 6*n
Where n is an integer.
The multiples between 10 and 87 are:
6*2 = 12
6*3 = 13
...
6*14 = 84
Then the sum of all these multiples can be written as:
[tex]6*2 + 6*3 + 6*4 + ... + 6*14\\\\= 6*(2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 + 14) = 624[/tex]
The sum of all multiples of 6 between 12 and 87 is equal to 624.
If you want to learn more about multiples:
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